/**
***********************************************************************
*
* Copyright 2011 Stefan Wöhle
*
* This file is part of PixelMath
*
* PixelMath is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* PixelMath is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with PixelMath. If not, see <http://www.gnu.org/licenses/>.
*
***********************************************************************
*/

#ifndef CONSTANT_H
#define CONSTANT_H

#include "formula.h"

/*********************************************************
 *
 *  Constant
 *
 *  value() returns a predefined value. Next to x and y
 *  this is the only formula without subformulas.
 *
 **********************************************************/

class Constant : public Formula
{
    Q_OBJECT
private:
    double _value;

public:
    explicit Constant(QObject *parent = 0);
    explicit Constant(double v, QObject *parent = 0);
    double value(int x, int y);
    QString label();

public slots:
    void setValue(double v);
    void setSourceImage(QImage&);
};

#endif // CONSTANT_H
